More isn't always better: Too much calcium has risks. Dietary calcium is generally safe, but more isn't necessarily better, and excessive calcium doesn't provide extra bone protection. If you take calcium supplements and eat calcium-fortified foods, you may be getting more calcium than you realize.
Genetic Recombination in Bacteria. This is a process where genetic materials, contained in two separate genomes, are brought together within one unit. In bacteria the recombination takes place by (1) transformation, (2) transduction and (3) conjugation.
To make recombinant DNA, scientists first extract the DNA they want to mix. The DNA can come from completely different organisms, including bacteria, plants, animals, algae or fungi.Using specialized lab techniques, scientists cut the pieces of DNA they want and paste them together to make an entirely new mix of DNA, called recombinant DNA, or rDNA (See References 1).ses for rDNA. DNA from different sources can be mixed to make disease-resistant crops, new vaccines, cures for genetic diseases, and proteins to use in the treatment of conditions such as sickle cell anemia, diabetes, certain cancers and other diseases (See References 2).